docs: def tagrefs(self):
          """Get the tags and reference numbers of all the vgroup
          members.
  
          Args::
  
            no argument
  
          Returns::
  
            list of (tag,ref) tuples, one for each vgroup member
  
          C library equivalent : Vgettagrefs
                                                        """
          n = self._nmembers
          ret = []
          if n:
              tags = _C.array_int32(n)
              refs = _C.array_int32(n)
              k = _C.Vgettagrefs(self._id, tags, refs, n)
              _checkErr('tagrefs', k, "error getting tags and refs")
              for m in xrange(k):
                  ret.append((tags[m], refs[m]))
  
          return ret